63800061851 has 2 divisors, whose sum is σ = 63800061852. Its totient is φ = 63800061850.

The previous prime is 63800061823. The next prime is 63800061979. The reversal of 63800061851 is 15816000836.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63800061851 is a prime.

It is not a weakly prime, because it can be changed into another prime (63800061811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31900030925 + 31900030926.

It is an arithmetic number, because the mean of its divisors is an integer number (31900030926).

Almost surely, 2^63800061851 is an apocalyptic number.

63800061851 is a deficient number, since it is larger than the sum of its proper divisors (1).

63800061851 is an equidigital number, since it uses as much as digits as its factorization.

63800061851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 63800061851 in words is "sixty-three billion, eight hundred million, sixty-one thousand, eight hundred fifty-one".